Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Date of Patent
January 12, 2010
0Patent Application Number
107446440
Date Filed
December 23, 2003
0Patent Primary Examiner
Patent abstract
An S-curve discriminating portion discriminates that a recording face of an optical disk is opposed to a pickup when a normal S-curve appears in a waveform of a focus error signal Fe that appears when an objective lens fluctuates vertically, while discriminates that a label face is opposed when the waveform of the focus error signal is distorted and two S-curves with large and small magnitudes appear. A signal indicating this discriminated result is supplied to a control portion for controlling respective portions of an optical disk drive.
Timeline
No Timeline data yet.
Further Resources
No Further Resources data yet.
